Yang Kang-chil is a man who has spent 16 years in prison after being falsely accused of murder. Upon his release, he meets Jung Ji-na, a veterinarian who is pragmatic and somewhat cynical about love. As Kang-chil attempts to navigate his new life, he discovers he has a guardian angel in his friend Lee Gook-soo, who believes Kang-chil is destined for a miracle. The series explores themes of redemption, fate, and the power of love to heal deep-seated trauma. As Kang-chil and Ji-na grow closer, they must confront the dark secrets of the past, including the truth behind the murder case that stole Kang-chil's youth, while navigating the supernatural interventions that threaten to alter their reality.